421279715823 has 16 divisors (see below), whose sum is σ = 573684028416. Its totient is φ = 274864826720.

The previous prime is 421279715797. The next prime is 421279715839. The reversal of 421279715823 is 328517972124.

It is a cyclic number.

It is not a de Polignac number, because 421279715823 - 2⁸ = 421279715567 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421279715323) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3724918 + ... + 3836348.

It is an arithmetic number, because the mean of its divisors is an integer number (35855251776).

Almost surely, 2^421279715823 is an apocalyptic number.

421279715823 is a deficient number, since it is larger than the sum of its proper divisors (152404312593).

421279715823 is a wasteful number, since it uses less digits than its factorization.

421279715823 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138294.

The product of its digits is 1693440, while the sum is 51.

The spelling of 421279715823 in words is "four hundred twenty-one billion, two hundred seventy-nine million, seven hundred fifteen thousand, eight hundred twenty-three".